In this paper we obtain empirical evidence of the relationship between individuals' risk attitudes and individuals' beliefs on their rival's choices in the Prisoners' Dilemma game. We find that (i) Risk-averse subjects seem to think that their opponent will defect, (ii) Risk-loving individuals...

Charles Darwin (1874) stated that "women are less selfish but men are more competitive". Very recent papers (Eckel & Grossman, 1998, 2001 or Andreoni & Vesterlund 2001, among others) have shown the relevance of gender in altruism in both ultimatum and dictator games. In this paper we analyse the...